Hypodermic syringe.



Q Y y y @67,1961

2f polygon recess on its imier face n coml In testimony svhefeof I hav'esg'nedwmy f binatlon with zg. piston having a graduated -name to this specification, in the presen of '5 stem Ws s. shortthreaded portion back of two subscribin witnesses.

l the gmd an adjustable stop nut on OHN ELLWOOD LEE. 'v said shot;u .aded portion, and an expan- Witnesses: I

sion cone iu the piston with a projection to M. E. WRIGHT,

enter and engage said recess in the cap piece. A. A. BARR. 

